Affiliation: | 1. Institute of Health Policy & Management, Erasmus University Rotterdam, Rotterdam, The NetherlandsCo‐first authorship;2. Department of Supply Chain Management & Management Science, University of Cologne, K?ln, Germany;3. Department of Neonatology and Paediatric Intensive Care, Children's Hospital, University Hospital of Cologne, K?ln, Germany;4. Department of Business Administration and Health Care Management, University of Cologne, K?ln, Germany |